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Ships within 48 hours · Estimated delivery Nov 18 - Nov 23
They are slightly louder than OEM with the valves closed and significantly louder with the valves open
875" primaries
This is easily the most intricate production header system ever offered
We present you a standard of quality generally reserved for small boutique fabricators
C7 Corvette GS/Z06/ZR1 - Catback Ultimate NPP Valve Control:Vacuum Valve Control They are slightly louder thanUltimate means ultimate. Larger diameter than any "extreme" system on the market. The INSIDE diameter of this exhaust is the OUTSIDE diameter of a 3" exhaust. Essentially larger than 3" straight pipes. If you purchase the exhaust without our headers, you will need to use adapter sleeves that will be included. Compatible with the OEM NPP control or vacuum control for non NPP cars.
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